tmk_core/protocol/lufa/LUFA-120730/LUFA/Drivers/USB/Class/Host/AudioClassHost.c

   1 /*\r
   2              LUFA Library\r
   3      Copyright (C) Dean Camera, 2012.\r
   4 \r
   5   dean [at] fourwalledcubicle [dot] com\r
   6            www.lufa-lib.org\r
   7 */\r
   8 \r
   9 /*\r
  10   Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
  11 \r
  12   Permission to use, copy, modify, distribute, and sell this\r
  13   software and its documentation for any purpose is hereby granted\r
  14   without fee, provided that the above copyright notice appear in\r
  15   all copies and that both that the copyright notice and this\r
  16   permission notice and warranty disclaimer appear in supporting\r
  17   documentation, and that the name of the author not be used in\r
  18   advertising or publicity pertaining to distribution of the\r
  19   software without specific, written prior permission.\r
  20 \r
  21   The author disclaim all warranties with regard to this\r
  22   software, including all implied warranties of merchantability\r
  23   and fitness.  In no event shall the author be liable for any\r
  24   special, indirect or consequential damages or any damages\r
  25   whatsoever resulting from loss of use, data or profits, whether\r
  26   in an action of contract, negligence or other tortious action,\r
  27   arising out of or in connection with the use or performance of\r
  28   this software.\r
  29 */\r
  30 \r
  31 #define  __INCLUDE_FROM_USB_DRIVER\r
  32 #include "../../Core/USBMode.h"\r
  33 \r
  34 #if defined(USB_CAN_BE_HOST)\r
  35 \r
  36 #define  __INCLUDE_FROM_AUDIO_DRIVER\r
  37 #define  __INCLUDE_FROM_AUDIO_HOST_C\r
  38 #include "AudioClassHost.h"\r
  39 \r
  40 uint8_t Audio_Host_ConfigurePipes(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,\r
  41                                   uint16_t ConfigDescriptorSize,\r
  42                                   void* ConfigDescriptorData)\r
  43 {\r
  44         USB_Descriptor_Endpoint_t*  DataINEndpoint          = NULL;\r
  45         USB_Descriptor_Endpoint_t*  DataOUTEndpoint         = NULL;\r
  46         USB_Descriptor_Interface_t* AudioControlInterface   = NULL;\r
  47         USB_Descriptor_Interface_t* AudioStreamingInterface = NULL;\r
  48 \r
  49         memset(&AudioInterfaceInfo->State, 0x00, sizeof(AudioInterfaceInfo->State));\r
  50 \r
  51         if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration)\r
  52           return AUDIO_ENUMERROR_InvalidConfigDescriptor;\r
  53 \r
  54         while ((AudioInterfaceInfo->Config.DataINPipe.Address  && !(DataINEndpoint)) ||\r
  55                (AudioInterfaceInfo->Config.DataOUTPipe.Address && !(DataOUTEndpoint)))\r
  56         {\r
  57                 if (!(AudioControlInterface) ||\r
  58                     USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,\r
  59                                               DCOMP_Audio_Host_NextAudioInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)\r
  60                 {\r
  61                         if (!(AudioControlInterface) ||\r
  62                             USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,\r
  63                                                       DCOMP_Audio_Host_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)\r
  64                         {\r
  65                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,\r
  66                                                               DCOMP_Audio_Host_NextAudioControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)\r
  67                                 {\r
  68                                         return AUDIO_ENUMERROR_NoCompatibleInterfaceFound;\r
  69                                 }\r
  70 \r
  71                                 AudioControlInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);\r
  72 \r
  73                                 if (USB_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData,\r
  74                                                               DCOMP_Audio_Host_NextAudioStreamInterface) != DESCRIPTOR_SEARCH_COMP_Found)\r
  75                                 {\r
  76                                         return AUDIO_ENUMERROR_NoCompatibleInterfaceFound;\r
  77                                 }\r
  78                         }\r
  79 \r
  80                         AudioStreamingInterface = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Interface_t);\r
  81 \r
  82                         DataINEndpoint  = NULL;\r
  83                         DataOUTEndpoint = NULL;\r
  84 \r
  85                         continue;\r
  86                 }\r
  87 \r
  88                 USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t);\r
  89 \r
  90                 if ((EndpointData->EndpointAddress & ENDPOINT_DIR_MASK) == ENDPOINT_DIR_IN)\r
  91                   DataINEndpoint  = EndpointData;\r
  92                 else\r
  93                   DataOUTEndpoint = EndpointData;\r
  94         }\r
  95 \r
  96         AudioInterfaceInfo->Config.DataINPipe.Size   = le16_to_cpu(DataINEndpoint->EndpointSize);\r
  97         AudioInterfaceInfo->Config.DataINPipe.EndpointAddress = DataINEndpoint->EndpointAddress;\r
  98         AudioInterfaceInfo->Config.DataINPipe.Type   = EP_TYPE_ISOCHRONOUS;\r
  99         AudioInterfaceInfo->Config.DataINPipe.Banks  = 2;\r
 100         \r
 101         AudioInterfaceInfo->Config.DataOUTPipe.Size  = le16_to_cpu(DataOUTEndpoint->EndpointSize);\r
 102         AudioInterfaceInfo->Config.DataOUTPipe.EndpointAddress = DataOUTEndpoint->EndpointAddress;\r
 103         AudioInterfaceInfo->Config.DataOUTPipe.Type  = EP_TYPE_ISOCHRONOUS;\r
 104         AudioInterfaceInfo->Config.DataOUTPipe.Banks = 2;\r
 105         \r
 106         if (!(Pipe_ConfigurePipeTable(&AudioInterfaceInfo->Config.DataINPipe, 1)))\r
 107           return false;\r
 108         \r
 109         if (!(Pipe_ConfigurePipeTable(&AudioInterfaceInfo->Config.DataOUTPipe, 1)))\r
 110           return false;\r
 111 \r
 112         AudioInterfaceInfo->State.ControlInterfaceNumber    = AudioControlInterface->InterfaceNumber;\r
 113         AudioInterfaceInfo->State.StreamingInterfaceNumber  = AudioStreamingInterface->InterfaceNumber;\r
 114         AudioInterfaceInfo->State.EnabledStreamingAltIndex  = AudioStreamingInterface->AlternateSetting;\r
 115         AudioInterfaceInfo->State.IsActive = true;\r
 116 \r
 117         return AUDIO_ENUMERROR_NoError;\r
 118 }\r
 119 \r
 120 static uint8_t DCOMP_Audio_Host_NextAudioControlInterface(void* CurrentDescriptor)\r
 121 {\r
 122         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);\r
 123 \r
 124         if (Header->Type == DTYPE_Interface)\r
 125         {\r
 126                 USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);\r
 127 \r
 128                 if ((Interface->Class    == AUDIO_CSCP_AudioClass) &&\r
 129                     (Interface->SubClass == AUDIO_CSCP_ControlSubclass) &&\r
 130                     (Interface->Protocol == AUDIO_CSCP_ControlProtocol))\r
 131                 {\r
 132                         return DESCRIPTOR_SEARCH_Found;\r
 133                 }\r
 134         }\r
 135 \r
 136         return DESCRIPTOR_SEARCH_NotFound;\r
 137 }\r
 138 \r
 139 static uint8_t DCOMP_Audio_Host_NextAudioStreamInterface(void* CurrentDescriptor)\r
 140 {\r
 141         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);\r
 142 \r
 143         if (Header->Type == DTYPE_Interface)\r
 144         {\r
 145                 USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);\r
 146 \r
 147                 if ((Interface->Class    == AUDIO_CSCP_AudioClass) &&\r
 148                     (Interface->SubClass == AUDIO_CSCP_AudioStreamingSubclass) &&\r
 149                     (Interface->Protocol == AUDIO_CSCP_StreamingProtocol))\r
 150                 {\r
 151                         return DESCRIPTOR_SEARCH_Found;\r
 152                 }\r
 153         }\r
 154 \r
 155         return DESCRIPTOR_SEARCH_NotFound;\r
 156 }\r
 157 \r
 158 static uint8_t DCOMP_Audio_Host_NextAudioInterfaceDataEndpoint(void* CurrentDescriptor)\r
 159 {\r
 160         USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);\r
 161 \r
 162         if (Header->Type == DTYPE_Endpoint)\r
 163         {\r
 164                 USB_Descriptor_Endpoint_t* Endpoint = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Endpoint_t);\r
 165 \r
 166                 if ((Endpoint->Attributes & EP_TYPE_MASK) == EP_TYPE_ISOCHRONOUS)\r
 167                   return DESCRIPTOR_SEARCH_Found;\r
 168         }\r
 169         else if (Header->Type == DTYPE_Interface)\r
 170         {\r
 171                 return DESCRIPTOR_SEARCH_Fail;\r
 172         }\r
 173 \r
 174         return DESCRIPTOR_SEARCH_NotFound;\r
 175 }\r
 176 \r
 177 uint8_t Audio_Host_StartStopStreaming(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,\r
 178                                                   const bool EnableStreaming)\r
 179 {\r
 180         if (!(AudioInterfaceInfo->State.IsActive))\r
 181           return HOST_SENDCONTROL_DeviceDisconnected;\r
 182 \r
 183         return USB_Host_SetInterfaceAltSetting(AudioInterfaceInfo->State.StreamingInterfaceNumber,\r
 184                                                EnableStreaming ? AudioInterfaceInfo->State.EnabledStreamingAltIndex : 0);\r
 185 }\r
 186 \r
 187 uint8_t Audio_Host_GetSetEndpointProperty(USB_ClassInfo_Audio_Host_t* const AudioInterfaceInfo,\r
 188                                                       const uint8_t DataPipeIndex,\r
 189                                                       const uint8_t EndpointProperty,\r
 190                                                       const uint8_t EndpointControl,\r
 191                                                       const uint16_t DataLength,\r
 192                                                       void* const Data)\r
 193 {\r
 194         if (!(AudioInterfaceInfo->State.IsActive))\r
 195           return HOST_SENDCONTROL_DeviceDisconnected;\r
 196 \r
 197         uint8_t RequestType;\r
 198         uint8_t EndpointAddress;\r
 199 \r
 200         if (EndpointProperty & 0x80)\r
 201           RequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT);\r
 202         else\r
 203           RequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT);\r
 204 \r
 205         Pipe_SelectPipe(DataPipeIndex);\r
 206         EndpointAddress = Pipe_GetBoundEndpointAddress();\r
 207 \r
 208         USB_ControlRequest = (USB_Request_Header_t)\r
 209                 {\r
 210                         .bmRequestType = RequestType,\r
 211                         .bRequest      = EndpointProperty,\r
 212                         .wValue        = ((uint16_t)EndpointControl << 8),\r
 213                         .wIndex        = EndpointAddress,\r
 214                         .wLength       = DataLength,\r
 215                 };\r
 216 \r
 217         Pipe_SelectPipe(PIPE_CONTROLPIPE);\r
 218 \r
 219         return USB_Host_SendControlRequest(Data);\r
 220 }\r
 221 \r
 222 #endif\r
 223 \r